From owner-qrp-l@Lehigh.EDU Wed Jan 14 13:29:44 1998 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id NAA28084 for ; Wed, 14 Jan 1998 13:29:42 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <13856-51980>; Wed, 14 Jan 1998 13:29:05 -0500 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <13827-51980>; Wed, 14 Jan 1998 13:26:46 -0500 Received: from rgfn.epcc.Edu (rgfn.epcc.edu [208.136.234.19]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with SMTP id NAA166496 for ; Wed, 14 Jan 1998 13:26:34 -0500 Received: by rgfn.epcc.Edu (4.1/SMI-4.1) id AA03420; Wed, 14 Jan 98 10:37:25 MST Message-Id: <9801141737.AA03420@rgfn.epcc.Edu> Date: Wed, 14 Jan 98 10:37:25 MST Reply-To: af852@rgfn.epcc.Edu Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: af852@rgfn.epcc.Edu (William R Colbert) To: "Low Power Amateur Radio Discussion" Subject: re: phased verticals X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO I have operated with phased verticals, both multiband and single band for the past 30 years with good results. For Foxy's question - I have used spacings of 1/8 to 1/2 wavelength with varying results. You can find pattern drawings from very small spacings to over 1 wavelength with varying amounts of phasing in Antennas - edited by Jasik, and in 73 Vertical antennas by Ed Noll. In addition, some patterns are in the classic vertical antenna handbook by Paul Lee - N6PL. For those that asked about the phase network, I found that Lee's Ohms Law network as described in his book was the best for me. It provided up to near 30 db f/b and substantial forward gain at a low angle. I think the forward gain in the neighborhood of 3 db and maybe approaching 4 to 5 db in the broadside configuration. The network uses a power divider setup as well as the phasing and directional switching which is for unidirection (for me NE/SW and broadside for NW/SE bidirectional). There has numerous articles on phased arrays using resistors, networks (fixed) and coax. Most of these limit the antenna to a fixed frequency for the optimum performance. For the multiband or multifrequency uses, I use the Ohms Law network or a simple l/c network with a 3p3t switch for the directional switching. Spacing I chose was 23 feet (30 meters) which is quite good for 40, 20 and 17. It is still workable on 80 but basically a gain omni antenna. One final comment about drawings; Jerry Swank, W8HXR (SK) used to write about phased arrays, verticals, dipoles, slopers, and had in 73 magazine in the late 70's or early 80's (just after they went large page format) a two part article called "Novice Guide to Phased Arrays". It shows various configurations, spacing and phasing patterns for .125 spacing to 1.0 and phasing from 0 deg to 180 deg. Hope the comments are helpful to those contemplating such a system. Oh yes, if the system is remoted - hard to adjust for the maximum f/b at a particular frequency. Simply bring the feeders- exact equal lengths into the shack to the network and then twiddle the capacitors for best results. 73 Ray -- Ray Colbert, W5XE OOTC 3618, SOWP 1064M El Paso, Tx (Far West Texas) (also: v31xe@dzn.com) From owner-qrp-l@Lehigh.EDU Wed Jan 14 13:28:49 1998 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id NAA27944 for ; Wed, 14 Jan 1998 13:28:48 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <13831-50442>; Wed, 14 Jan 1998 13:28:10 -0500 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <13816-51980>; Wed, 14 Jan 1998 13:26:45 -0500 Received: from rgfn.epcc.Edu (rgfn.epcc.edu [208.136.234.19]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with SMTP id NAA130596 for ; Wed, 14 Jan 1998 13:26:26 -0500 Received: by rgfn.epcc.Edu (4.1/SMI-4.1) id AA04222; Wed, 14 Jan 98 10:43:42 MST Message-Id: <9801141743.AA04222@rgfn.epcc.Edu> Date: Wed, 14 Jan 98 10:43:42 MST Reply-To: af852@rgfn.epcc.Edu Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: af852@rgfn.epcc.Edu (William R Colbert) To: "Low Power Amateur Radio Discussion" Subject: Re: phased verticals X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO I forgot to mention on my last post that the networks discussed can be used with loops, dipoles, etc. I have not used them with dissimilar antennas so I can't comment as to how they would work with something like that. However, with like antennas, verticals or inverted v dipoles, I find there is very little to compare with the ability to completely null a station into the noise at 25 or 30 db, then switch to the opposite direction and find the same head and shoulders above others not in line with the antenna. Do keep in mind that the forward pattern is very, VERY broad compared to a yagi. 73 Ray -- Ray Colbert, W5XE OOTC 3618, SOWP 1064M El Paso, Tx (Far West Texas) (also: v31xe@dzn.com)